Display module and display device

Abstract

The embodiment of the invention discloses a display module and a display device. A top film layer in the display panel comprises a first film layer branch part located in a first area and a second film layer branch part located in a second area, and the first film layer branch part comprises a first sub-branch part close to one side of the second film layer branch part. And the first protective layer covers the second film layer branch part and at least part of the first sub-branch part. The dredging structures are arranged in the first sub-part, and a first protection layer is arranged in a gap between every two adjacent dredging structures. The projection length of the dredging structure in the first direction is greater than or equal to the projection length in the second direction; wherein the first direction is the direction from the first area to the second area, and the second direction intersects with the first direction. Thus, the extending channel of the first protection layer is formed through the dredging structure arranged on the first sub-part, a part of the first protection layer is contained, the climbing phenomenon of the first protection layer is improved, and the display effect of the display module is improved.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a display module and a display device. Background Art

[0002] With the development of display technologies, organic light emitting diode (OLED) flexible display panels have gradually emerged. A flexible display panel refers to a screen that can be bent, folded, and has good flexibility. Compared with traditional rigid screens, flexible screens have characteristics such as good flexibility, thin and light volume, low power consumption, and resistance to rubbing.

[0003] In the prior art, a protective glue layer is usually formed in the bending area and some non-bending areas of the flexible display panel. However, when preparing the protective glue layer, it is easy for the protective glue layer to climb to the display area, resulting in a whitening phenomenon in the edge area of the display area and affecting the display effect of the display panel. Summary of the Invention

[0004] The present invention provides a display module and a display device. By providing a dredging structure in the first sub-division to form an extension channel for the first protective layer to accommodate part of the first protective layer, the climbing phenomenon of the first protective layer is improved, and the display effect of the display module is enhanced.

[0005] In a first aspect, an embodiment of the present invention provides a display module, including:

[0006] A display panel, including a first area and a second area, where the bending curvature of the second area is greater than that of the first area; the display panel further includes a top layer film, and the plane where the top layer film is located is the light-emitting surface of the display panel; the top layer film includes a first film sub-division located in the first area and a second film sub-division located in the second area, and the first film sub-division includes a first sub-division on the side close to the second film sub-division;

[0007] A first protective layer, covering the second film sub-division and at least part of the first sub-division;

[0008] A dredging structure, provided in the first sub-division, and the first protective layer is provided in the gap between two adjacent dredging structures; the projection length of the dredging structure in the first direction is greater than or equal to the projection length in the second direction; where the first direction is the direction from the first area to the second area, and the second direction intersects with the first direction.

[0009] In a second aspect, an embodiment of the present invention provides a display device, including the display module provided in the first aspect of the present invention.

[0010] An embodiment of the present invention provides a display module, which includes a display panel, a first protective layer, and a dredging structure. The top layer film of the display panel includes a first film layer sub-portion located in a first region and a second film layer sub-portion located in a second region, where the bending region of the second region is greater than the bending curvature of the first region. The first film layer sub-portion includes a first sub-portion on one side close to the second film layer sub-portion, that is, the first sub-portion is the edge portion of the first film layer sub-portion close to the second region. Furthermore, a plurality of dredging structures are provided in the first sub-portion, and the plurality of dredging structures penetrate at least part of the first sub-portion. In this way, when the first protective layer flows from the second region to the first region, by setting the projection length of the dredging structure in the first direction to be greater than or equal to the projection length in the second direction, where the first direction is the direction from the first region to the second region, the plurality of dredging structures play a role in guiding the first protective layer and form an extension channel for the first protective layer, so as to accommodate part of the first protective layer between two adjacent dredging structures, thereby reducing the flow distance of the first protective layer, avoiding the first protective layer climbing to the display area of the display module, and improving the display effect of the display module. Description of the Drawings

[0011] Figure 1 is a schematic cross-sectional view of a display panel provided by an embodiment of the present invention;

[0012] Figure 2 is a schematic top view of a first sub-portion provided by an embodiment of the present invention;

[0013] Figure 3 is a schematic cross-sectional view of a first sub-portion along a second direction provided by an embodiment of the present invention;

[0014] Figure 4 is another schematic top view of a first sub-portion provided by an embodiment of the present invention;

[0015] Figure 5 is yet another schematic top view of a first sub-portion provided by an embodiment of the present invention;

[0016] Figure 6 is yet another schematic top view of a first sub-portion provided by an embodiment of the present invention;

[0017] Figure 7 is yet another schematic top view of a first sub-portion provided by an embodiment of the present invention;

[0018] Figure 8 is another schematic cross-sectional view of a first sub-portion along a second direction provided by an embodiment of the present invention;

[0019] Figure 9 is yet another schematic cross-sectional view of a first sub-portion along a second direction provided by an embodiment of the present invention;

[0020] Figure 10 It is another schematic cross-sectional view of the first sub-portion along the second direction provided by an embodiment of the present invention;

[0021] Figure 11 It is another schematic cross-sectional view of the first sub-portion along the second direction provided by an embodiment of the present invention;

[0022] Figure 12 It is another schematic top view of the first sub-portion provided by an embodiment of the present invention;

[0023] Figure 13 It is a schematic structural view of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0024] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0025] Figure 1 It is a schematic cross-sectional view of a display panel provided by an embodiment of the present invention, Figure 2 It is a schematic top view of a first sub-portion provided by an embodiment of the present invention, Figure 3 It is a schematic cross-sectional view of a first sub-portion along the second direction provided by an embodiment of the present invention. Refer to Figure 1-3 , the display module includes a display panel 01, a first protective layer 02, and a dredging structure 03. Among them, the display panel 01 includes a first area AA1 and a second area AA2, and the bending curvature of the second area AA2 is greater than that of the first area AA1. The display panel 01 further includes a top layer film 10, and the plane where the top layer film 10 is located is the light-emitting surface of the display panel 01. The top layer film 10 includes a first film layer sub-portion 110 located in the first area AA1 and a second film layer sub-portion 120 located in the second area AA2. The first film layer sub-portion 110 includes a first sub-portion 111 on the side close to the second film layer sub-portion 120. The first protective layer 02 covers the second film layer sub-portion 120 and at least part of the first sub-portion 111. The dredging structure 03 is disposed in the first sub-portion 111, and the first protective layer 02 is disposed in the gap between two adjacent dredging structures 03. The projection length of the dredging structure 03 in the first direction X is greater than or equal to the projection length in the second direction Y, where the first direction X is the direction from the first area AA1 to the second area AA2, and the second direction Y intersects with the first direction X.

[0026] Specifically, as Figures 1-3As shown in the figure, the display panel 01 may include a first region AA1, a second region AA2, and a third region AA3. Among them, the first region AA1 may be the light-emitting region of the display panel 01, that is, a part of the first region AA1 is the display area, and the display area includes a plurality of light-emitting devices, such as sub-pixels. The third region AA3 is disposed opposite to the first region AA1, that is, the third region AAA3 may be the bonding region of the display panel 01. The bonding region includes various metal traces, various interfaces, and circuit structures in the display area, such as VT test ports, ESD protection structures, power signal lines, and so on. In addition, the display panel 01 further includes a second region AA2 connecting the first region AA1 and the third region AA3, and the bending curvature of the second region AA2 is greater than that of the first region AA1. In other words, the second region AA2 is the bending region of the display panel 01. In the bending region, the display panel 01 is bent from the light-emitting surface toward the side where the non-light-emitting surface is located. After bending, the light-emitting surface is located on the outside of the display panel, and the non-light-emitting surface is located on the inside of the display panel 01. In addition, a driving chip (not shown in the figure) may be provided on the third region AA3. The driving chip includes various types, such as a display driving chip and a touch driving chip. The display driving chip is used to store image data, generate driving voltage, and can also improve image quality through a customized algorithm and other functions. The touch driving chip mainly realizes touch signal processing and is a necessary component of a display device with touch function. Of course, the display driving chip and the touch driving chip may be integrated and disposed on the third region AA3 at the same time. In addition, the third region AA3 is bent along the second region AA2 to the non-light-emitting side of the first region AA1 through a flexible substrate, so that the area of the lower step region or the fan-out region of the display module can be reduced, thereby reducing the proportion of the non-display region and improving the screen-to-body ratio of the display module.

[0027] In addition, the display panel 01 further includes a top film layer 10, which can be understood as the outermost film layer on the light-emitting side of the display panel 01, that is, the top film layer 10 is the light-emitting surface of the display panel 01. Among them, the top film layer 10 may include a single film layer or multiple film layers, and the present invention does not limit this. Those skilled in the art can set it according to needs. The top film layer 10 includes a first film layer sub-division 110 located in the first region AA1 and a second film layer sub-division 120 located in the second region AA2. The first film layer sub-division 110 includes a first sub-division 111 on the side close to the second film layer sub-division 120, that is, the first sub-division 111 is the edge part of the first film layer sub-division 110 close to the second region AA2. The display module further includes a first protective layer 02. The material of the first protective layer 02 may include UV glue, and the first protective layer 02 covers the second film layer sub-division 120 and at least part of the first sub-division 111 to protect the bent second region AA2 and part of the first region AA1. In an embodiment, the first film layer sub-division 110 further includes a second sub-division (not shown in the figure) on the side away from the second film layer sub-division 120. The first sub-division 111 and the second sub-division are connected to each other, and the region where the second sub-division is located is the display area of the first region AA1, and the region where the first sub-division 111 is located is the non-display area of the first region AA1.

[0028] The inventors have found through research that currently, when coating the first protective layer 02 on the second film layer sub-division 120 and part of the first sub-division 111, due to the self-leveling property of the material of the first protective layer 02, when the material of the first protective layer 02 levels on the first sub-division 111, it will climb to the upper surface of the region where the second sub-division is located, that is, climb onto the display area of the first region AA1 and remain on the display area. Furthermore, in the subsequent lamination process, the residual adhesive layer material will lift the optical adhesive layer at the edge of the display area, causing an optical refraction difference and resulting in a whitening phenomenon at the edge viewing angle of the display area.

[0029] Therefore, in the embodiment of the present invention, a plurality of dredging structures 03 are provided in the first sub-division 111, and the plurality of dredging structures 03 penetrate at least part of the top film layer 10. As Figure 2 and Figure 3In the illustrated embodiment, the dredging structure 03 completely penetrates the top layer film 10, and the projection length of the dredging structure 03 in the first direction X is greater than or equal to the projection length in the second direction Y. Thus, when the material of the first protective layer 02 levels in the direction from the second region AA2 to the first region AA1, since the projection length of the dredging structure 03 in the second direction Y is smaller, that is, the blocking effect of the dredging structure 03 on the first direction X is smaller, and there are gaps between adjacent dredging structures 03. Therefore, the plurality of dredging structures 03 mainly play a role in guiding the first protective layer 02, so that part of the first protective layer 02 flows into the interval between adjacent dredging structures 03 along the dredging structure 03 to form an extension channel. After accommodating part of the first protective layer 02 through the gap between adjacent dredging structures 03, the flow distance of the first protective layer 02 can be reduced, thereby avoiding the first protective layer 02 flowing to the display area and climbing and remaining on the display area, improving the display effect of the display module.

[0030] It should be noted that when the display panel 01 is not bent, that is, when the bending curvatures of the first region AA1 and the second region AA2 are the same, the first direction X can be the direction from the first region AA1 to the second region AA2; after the display panel 01 is bent, that is, when the bending curvature of the second region AA2 is greater than the bending curvature of the first region AA1, the first direction X can be the direction from the first sub-division 111 to the second sub-division, where the first sub-division 111 is the part of the first film layer sub-division 110 close to the second film layer sub-division 120, and the second sub-division is the part of the first film layer sub-division 110 far from the second film layer sub-division 120. In addition, the region where the first sub-division 111 is located can be the non-display area of the display panel 01, and the region where the second sub-division is located can be the display area of the display panel 01.

[0031] It should also be noted that Figure 2 and Figure 3 the distinction between the dredging structure 03 and the first sub-division 111 by different fillings in [[ ]] is not a limitation on the materials of the dredging structure 03 and the first sub-division 111. It can be understood that the materials of the dredging structure 03 and the first sub-division 111 can be the same or different, and those skilled in the art can set them according to needs. In addition, Figure 2 and Figure 3 in [[ ]], in order to better illustrate the shape of the dredging structure 03, the first protective layer 02 is not shown on the dredging structure 03 and between adjacent dredging structures 03. It is easy for those skilled in the art to think that in the actual product, the first protective layer 02 is provided on the dredging structure 03 and between adjacent dredging structures 03, and the following will not be elaborated one by one.

[0032] In summary, in the embodiment of the present invention, a plurality of dredging structures are provided in the first sub-portion. Among them, a gap is provided between two adjacent dredging structures, and the projection length of the dredging structure in the first direction is greater than or equal to the length in the second direction. In this way, when the first protective layer levels in the direction from the second region to the first region, since the projection length of the dredging structure in the second direction is small, therefore, the plurality of dredging structures mainly play a role in guiding the first protective layer, so that part of the first protective layer flows into the gap between two adjacent dredging structures along the dredging structure to form an extension channel. After accommodating part of the first protective layer through the gap between two adjacent dredging structures, the flow distance of the first protective layer can be reduced, thereby avoiding the first protective layer flowing to the display area and climbing and remaining on the display area, and improving the display effect of the display module.

[0033] Optionally, on the basis of the above embodiment, continue to refer to Figure 2 , the dredging structure 03 includes a portion extending along the first direction X. Specifically, the first direction X is the leveling direction of the first protective layer 02. Furthermore, by setting the dredging structure 03 to include a portion extending along the first direction X, the material of the first protective layer 02 can flow into the gap between two adjacent dredging structures 03 along the portion extending along the first direction X during leveling, so as to ensure that the gap between two adjacent dredging structures 03 can accommodate more material of the first protective layer 02, further reducing the flow distance of the first protective layer 02 and improving the display effect of the display panel.

[0034] Optionally, on the basis of the above embodiment, continue to refer to Figure 2 , the dredging structure 03 extends along the first direction X, and a plurality of dredging structures 03 are arranged along the second direction Y. Specifically, in the embodiment shown in Figure 2 , the dredging structure 03 extends along the first direction X as a whole, that is, the extension direction of the dredging structure 03 is the same as the leveling direction of the material of the first protective layer 02 during leveling. In this way, the blocking effect of the dredging structure 03 on the first protective layer 02 is the smallest, and thus more material of the first protective layer 02 can flow into the gap between two adjacent dredging structures 03. In addition, since the dredging structure 03 is linear as a whole when extending along the first direction X, compared with the dredging structure 03 with a bent portion, the space occupied is smaller, so that a larger gap can be vacated between two adjacent dredging structures 03 to accommodate more material of the first protective layer 02, further reducing the flow distance of the first protective layer 02 and improving the display effect of the display panel.

[0035] In another embodiment, Figure 4 is a top view schematic diagram of another first sub-portion provided by the embodiment of the present invention. Refer to Figure 1 and Figure 4, the dredging structure 03 includes a first branch 310, a second branch 320, and a third branch 330 arranged along the first direction X, and the second branch 320 connects the first branch 310 and the third branch 330.

[0036] The first branch 310 and / or the third branch 330 extends along the first direction X, and the second branch 320 includes a curve.

[0037] Exemplarily, as Figure 4 In the shown embodiment, the dredging structure 03 may further include a part extending along the first direction X and a part extending along the second direction Y. Specifically, the dredging structure 03 includes a first branch 310, a second branch 320, and a third branch 330 arranged along the first direction X. Among them, the first branch 310 includes a part extending along the first direction X, the third branch 330 includes a part extending along the first direction X, and the second branch 320 includes a part extending along the first direction X and a part extending along the second direction Y, so that the second branch 320 forms an arc-shaped convex towards a certain side surface. In this way, a concave area with a larger accommodation space can be formed between the second branches 320 of two adjacent dredging structures 30. Furthermore, when the material of the first protective layer 02 levels along the first direction X, under the guiding action of the first branch 310, the second branch 320, and the third branch 330, more material of the first protective layer 02 can enter the concave area, and due to the structural characteristics of the concave area, the entered material of the first protective layer 02 is not easy to flow out, improving the accommodation effect of the dredging structure 03, reducing the flow distance of the first protective layer 02, and enhancing the display effect of the display panel.

[0038] In another embodiment, Figure 5 is a top view schematic diagram of another first sub-branch provided by an embodiment of the present invention. Refer to Figure 1 and Figure 5 , the dredging structure 03 at least includes a fourth branch 340, and the fourth branch 340 extends along the third direction M, and the third direction M intersects both the first direction X and the second direction Y. The projection length of the fourth branch 340 in the first direction X is greater than the projection length in the second direction Y.

[0039] Exemplarily, as Figure 5In the illustrated embodiment, the dredging structure 03 can also be inclined. Specifically, when the dredging structure 03 extends along the first direction X, the dredging structure 03 is vertically arranged, that is, the extending direction of the dredging structure 03 is the same as the leveling direction of the material of the first protective layer 02. When the dredging structure 03 is inclined, the extending direction of the dredging structure 03 intersects with the leveling direction of the material of the first protective layer 02, that is, the fourth branch 340 extends along the third direction M, and the third direction M intersects with both the first direction X and the second direction Y. On this basis, by setting the projection length of the fourth branch 340 in the first direction X to be greater than the projection length in the second direction Y, the projection length of the fourth branch 340 in the second direction Y is made smaller, that is, the blocking effect of the fourth branch 340 on the first direction X is smaller, which facilitates part of the material of the first protective layer 02 to flow into the interval between two adjacent dredging structures 03 along the dredging structure 03 to form an extending channel, reducing the flow distance of the first protective layer 02, thereby avoiding the first protective layer 02 flowing to the display area and climbing and remaining on the display area, and improving the display effect of the display module.

[0040] It should be noted that Figure 5 only the dredging structure 03 including only the fourth branch 340 is taken as an example for illustration, but it is not limited thereto. In other embodiments, Figure 6 is a top view schematic diagram of another first sub-branch provided by an embodiment of the present invention. As Figure 6 shown, the dredging structure 03 further includes a fourth branch 340 and a fifth branch 350. The fourth branch 340 extends along the third direction M, and the third direction M intersects with both the first direction X and the second direction Y. The fifth branch 350 extends along the fourth direction N, and the fourth direction N intersects with the first direction X, the second direction Y, and the third direction M. The projection length of the fourth branch 340 in the first direction X is greater than the projection length in the second direction Y, and the projection length of the fifth branch 350 in the first direction X is greater than the projection length in the second direction Y. In addition, the fourth branch 340 and the fifth branch 350 intersect to form a fork-shaped dredging structure 03. Then, between two adjacent dredging structures 03, two fork-shaped structures will form a receiving space that gradually increases from the upper and lower sides to the middle. Then, when the material of the first protective layer 02 levels along the first direction X, under the guiding action of part of the fourth branch 340 and part of the fifth branch 350 (the folded side), more material of the first protective layer 02 can enter the middle area, and the material of the first protective layer 02 that enters is not easy to flow out, thereby improving the receiving effect of the dredging structure 03, reducing the flow distance of the first protective layer 02, and improving the display effect of the display panel.

[0041] In yet another embodiment, Figure 7 is a top view schematic diagram of another first sub-branch provided by an embodiment of the present invention. Refer to Figure 1 andFigure 7 The display module further includes a plurality of dredging structure groups 30. Each dredging structure group 30 includes at least two dredging structures 03. At least two dredging structures 03 in the same dredging structure group 30 are arranged along a fourth direction N, and the fourth direction N intersects both the first direction X and the second direction Y. The projection length of at least two dredging structures 03 in the same dredging structure group 30 in the first direction X is greater than the projection length in the second direction Y.

[0042] Exemplarily, as Figure 7 In the shown embodiment, the plurality of dredging structure groups 30 are arranged along the second direction Y. The dredging structure group 30 includes two dredging structures 03. By arranging the two dredging structures 03 in the same dredging structure group 30 along the fourth direction N, and the projection length of the two dredging structures 03 in the first direction X is greater than the projection length in the second direction Y, the projection length of the dredging structure group 30 in the second direction Y is smaller, that is, the blocking effect of the dredging structure group 30 on the first direction X is smaller. In addition, since there is a gap between adjacent two dredging structures 03 in the dredging structure group 30, and there is also a gap between adjacent two dredging structure groups 30, more gaps can be used to accommodate more of the first protective layer 02, thereby reducing the flow distance of the first protective layer 02 and improving the display effect of the display panel.

[0043] It can be understood that, continuing to refer to Figure 7 the dredging structure 03 can be a circular structure. Thus, when the material of the first protective layer 02 flows into the gap through the dredging structure 03, the blocking effect of the circular dredging structure 03 on the first protective layer 02 is smaller, so as to achieve a better guiding effect. In other embodiments, the dredging structure 03 can also be of other shapes, and the present invention does not limit this. Those skilled in the art can set it according to needs.

[0044] Optionally, on the basis of the above embodiments, continuing to refer to Figure 3, along the second direction Y, the maximum width of the dredging structure 03 is D1, and the minimum distance between two adjacent dredging structures 03 is D2, where 2μm ≤ D1 ≤ 4μm and 2μm ≤ D2 ≤ 4μm. Specifically, when the number of dredging structures 03 is fixed, if the maximum width of the dredging structure 03 is too large, the distance between two adjacent dredging structures 03 will be too small, and as a result, less first protective layer 02 can be accommodated between two adjacent dredging structures 03, leading to an insignificant improvement in the climbing phenomenon of the first protective layer 02. If the maximum width of the dredging structure 03 is too small, the supporting force of the dredging structure 03 will be insufficient. Therefore, by setting the maximum width D1 of the dredging structure 03 along the second direction Y to satisfy 2μm ≤ D1 ≤ 4μm and the minimum distance D2 between two adjacent dredging structures 03 to satisfy 2μm ≤ D2 ≤ 4μm, the supporting force of the dredging structure 03 and the accommodation space between two adjacent dredging structures 03 can be balanced.

[0045] Optionally, Figure 8 is another cross-sectional schematic diagram of the first sub-portion along the second direction provided by an embodiment of the present invention. Refer to Figure 8 , the top layer film 10 includes at least one sub-film layer 101. Along the thickness direction of the display module, the gap between two adjacent dredging structures 03 penetrates at least part of the sub-film layer 101.

[0046] Exemplarily, in the embodiment shown in Figure 8 , taking the top layer film 10 including one sub-film layer 101 as an example for illustration. In other embodiments, the top layer film 10 may further include multiple sub-film layers 101, which can be set by those skilled in the art according to needs. Along the thickness direction of the display module, the gap between two adjacent dredging structures 03 penetrates at least part of the sub-film layer 101. In this way, the gap between two adjacent dredging structures 03 is located below the outermost surface of the top layer film 10, and thus the material of the first protective layer 02 can be accommodated through this gap to reduce the leveling distance of the first protective layer 02. Preferably, the gap between two adjacent dredging structures 03 penetrates the top layer film 10, which can further increase the accommodation space of the gap between two adjacent dredging structures 03, further prevent the first protective layer 02 from flowing to the display area and climbing and remaining on the display area, and improve the display effect of the display module.

[0047] Optionally, on the basis of the above embodiment, continue to refer to Figure 8 , the display panel further includes a substrate 04. Along the thickness direction of the display module, the dredging structure 03 includes a first surface S1 on the side away from the substrate 04 and a second surface S2 on the side close to the substrate 04. Along the thickness direction of the display module, the first surface S1 covers the second surface S2.

[0048] Exemplarily, in Figure 1 and Figure 8As shown, along the thickness direction of the display module, the first surface S1 covers the second surface S2, that is, the cross-sectional shape of the dredging structure 03 is an inverted trapezoid. On the one hand, when the maximum width of the dredging structure 03 along the second direction Y is fixed, the inverted trapezoid structure can accommodate more materials of the first protective layer 02 compared with the rectangular structure, thereby further reducing the flow distance of the first protective layer 02. On the other hand, by setting the dredging structure 03 as an inverted trapezoid structure, the cross-section of the interval between two adjacent dredging structures can be a regular trapezoid, that is, the opening at the upper part of the interval is smaller than the opening at the lower part, so that the materials of the first protective layer 02 flowing into the interval are not easy to flow out, improving the accommodation effect of the interval, further reducing the flow distance of the first protective layer 02, avoiding the first protective layer 02 flowing to the display area and climbing and remaining on the display area, and improving the display effect of the display module.

[0049] Optionally, on the basis of the above embodiments, continue to refer to Figure 8 , the dredging structure 03 further includes a plurality of side surfaces L1, and the side surfaces L1 connect the first surface S1 and the second surface S2. The included angle between the side surface L1 and the second surface S2 is α, where α satisfies: 120° ≤ α ≤ 150°.

[0050] Exemplarily, as Figure 8 shown, the dredging structure 03 further includes two side surfaces L1 adjacent to the first surface S1 and the second surface S2. The side surfaces L1 connect the first surface S1 and the second surface S2, and the side surfaces L1 are inclined surfaces. On this basis, by setting the included angle α between the side surface L1 and the second surface S2 to satisfy: 120° ≤ α ≤ 150°, the angle of the opening at the lower part of the interval between two adjacent dredging structures 03 is greater than 30° or less than 60°, so as to ensure that the cross-sectional shape of the dredging structure 03 is an inverted trapezoid, and the cross-sectional shape of the interval between two adjacent dredging structures 03 is a regular trapezoid, further reducing the flow distance of the first protective layer 02 and improving the accommodation effect of the interval between two adjacent dredging structures 03.

[0051] Optionally, Figure 9 is another schematic cross-sectional view of the first sub-portion along the second direction provided by the embodiment of the present invention. Refer to Figure 1 and Figure 9 , the display panel 01 further includes a substrate 04. Along the thickness direction of the display module, the dredging structure 03 includes a third surface S3 on the side away from the substrate 04 and a fourth surface S4 on the side close to the substrate 04. The orthographic projection area of the third surface S3 on the plane where the substrate 04 is located is smaller than the maximum orthographic projection area of the dredging structure 03 on the plane where the substrate 04 is located, and the orthographic projection area of the fourth surface S4 on the plane where the substrate 04 is located is smaller than the maximum orthographic projection area of the dredging structure on the plane where the substrate is located.

[0052] Specifically, the cross-sectional shape of the dredging structure 03 can also be formed by combining multiple figures. Exemplarily, as Figure 9 In the shown embodiment, the cross-sectional shape of the dredging structure 03 includes a first part and a second part. Among them, the first part is located on the side of the dredging structure 03 away from the substrate 04, and the second part is located on the side of the dredging structure 03 close to the substrate 04. The cross-sectional shape of the first part can be rectangular, and the cross-sectional shape of the second part can be an inverted trapezoid. Moreover, the maximum width of the first part along the second direction Y is less than the maximum width of the second part along the second direction Y, so that the dredging structure 03 forms a structure that is wide in the middle and narrow at the top and bottom. At this time, the surface of the first part away from the substrate 04 is the third surface S3 on the side of the dredging structure 03 away from the substrate 04, and the surface of the second part close to the substrate 04 is the fourth surface S4 on the side of the dredging structure 03 close to the substrate 04. That is, the orthographic projection area of the third surface S3 on the plane where the substrate 04 is located is less than the maximum orthographic projection area of the dredging structure 03 on the plane where the substrate 04 is located, and the orthographic projection area of the fourth surface S4 on the plane where the substrate 04 is located is less than the maximum orthographic projection area of the dredging structure 03 on the plane where the substrate 04 is located. In this way, when the maximum width of the dredging structure 03 in the second direction Y is fixed, the structure that is wide in the middle and narrow at the top and bottom has a smaller volume than the overall inverted trapezoid structure. That is, the accommodation space formed by the interval between two adjacent dredging structures 03 is larger, and thus more materials of the first protective layer 02 can be accommodated, reducing the flow distance of the first protective layer 02 and improving the display effect of the display panel.

[0053] Optionally, Figure 10 is another cross-sectional schematic diagram of the first sub-division along the second direction provided by the embodiment of the present invention. Refer to Figure 10 , the top layer film 10 includes a first sub-film layer 101a and a second sub-film layer 101b. The first sub-film layer 101a is located on the side of the second sub-film layer 101b away from the substrate 04. The dredging structure 03 includes a first dredging sub-division 301 located in the first sub-film layer 101a and a second dredging sub-division 302 located in the second sub-film layer 101b. The first dredging sub-division 301 includes a third surface S3 and a fifth surface S5. The fifth surface S5 is located on the side of the third surface S3 close to the substrate 04. The orthographic projection area of the third surface S3 on the plane where the substrate 04 is located is less than the orthographic projection area of the fifth surface S5 on the plane of the substrate 04. The second dredging sub-division 302 includes a fourth surface S4 and a sixth surface S6. The sixth surface S6 is located on the side of the fourth surface S4 away from the substrate 04. The orthographic projection area of the fourth surface S4 on the plane where the substrate 04 is located is less than the orthographic projection area of the sixth surface S6 on the plane where the substrate 04 is located.

[0054] Exemplarily, as Figure 10In the illustrated embodiment, the top film layer 10 includes two sub-film layers 101, namely a first sub-film layer 101a and a second sub-film layer 101b. Among them, the first sub-film layer 101a is located on the outermost side of the top film layer 10. The dredging structure 03 includes a first dredging branch 301 and a second dredging branch 302. Among them, the first dredging branch 301 is located in the first sub-film layer 101a, and the first dredging branch 301 penetrates the first sub-film layer 101a. The first dredging branch 301 includes a third surface S3 on the side away from the substrate 04 and a fifth surface S5 on the side close to the substrate 04. The orthographic projection area of the third surface S3 on the plane where the substrate 04 is located is smaller than the orthographic projection area of the fifth surface S5 on the plane of the substrate 04. That is, along the thickness direction of the display module, the fifth surface S5 covers the third surface S3, so that the cross-sectional shape of the first dredging branch 301 is a regular trapezoid. The second dredging branch 302 includes a sixth surface S6 on the side away from the substrate 04 and a fourth surface S4 on the side close to the substrate 04. The orthographic projection area of the fourth surface S4 on the plane where the substrate 04 is located is smaller than the orthographic projection area of the sixth surface S6 on the plane where the substrate 04 is located. That is, along the thickness direction of the display module, the sixth surface S6 covers the fourth surface S4, so that the cross-sectional shape of the second dredging branch 302 is an inverted trapezoid. The first dredging branch 301 is located on the second dredging branch 302, that is, the fifth surface of the first dredging branch 301 and the sixth surface S6 of the second dredging branch 302 are the same surface, so that the first dredging branch 301 and the second dredging branch 302 as a whole form a structure that is narrow at the top and bottom and wide in the middle. And since the width of the dredging structure 03 gradually decreases from the middle to both sides, the volume of the dredging structure 03 can be further reduced, thereby further increasing the accommodation space formed by the interval between two adjacent dredging structures 03, so that this interval can accommodate more materials of the first protective layer 02, reducing the flow distance of the first protective layer 02 and improving the display effect of the display panel.

[0055] Optionally, on the basis of the above embodiment, Figure 11 is another cross-sectional schematic diagram of the first sub-division along the second direction provided by the embodiment of the present invention, Figure 12 is another top view schematic diagram of the first sub-division provided by the embodiment of the present invention. Refer to Figure 11 and Figure 12 and, the display panel further includes a substrate 04. The top film layer 10 includes a first sub-film layer 101a and a second sub-film layer 101b. The first sub-film layer 101a is located on the side of the second sub-film layer 101b away from the substrate 04. The first sub-division 111 includes a part of the second sub-film layer 101b. Along the thickness direction of the display module, the dredging structure 03 penetrates the second sub-film layer 101b.

[0056] Exemplarily, such as Figure 11 and Figure 12In the embodiment shown, the top film layer 10 includes a first sub-film layer 101a and a second sub-film layer 101b. Among them, the first sub-film layer 101a is not a whole layer, that is, as Figure 12 shown, the first sub-film layer 101a is located in the area where the second sub-division is located, and is not provided in the area where the first sub-division 111 is located. That is, along the thickness direction of the display module, the first sub-film layer 101a is staggeredly arranged with the first sub-division 111. In other words, the first sub-division 111 only includes a part of the second sub-film layer 101b. Furthermore, when the dredging structure 03 is only provided on the second sub-film layer 101b, it is avoided that the first sub-film layer 101a blocks the material of the first protective layer 02 from entering the interval between two adjacent dredging structures 03.

[0057] It should be noted that, continuing to refer to Figure 12 , along the first direction X, the first sub-film layer 101a includes a first edge close to the dredging structure 03, and the horizontal distance between the first edge and the first sub-division 111 is D3, where D3 > 1.5 μm. Specifically, when the top film layer 10 includes the first sub-film layer 101a and the second sub-film layer 101b, and the dredging structure 03 is only provided on the second sub-film layer 101b, if the distance between the first sub-film layer 101a and the first sub-division 111 is too small, it may occur that the first sub-film layer 101a blocks the material of the first protective layer 02 from entering the interval between two adjacent dredging structures 03. Therefore, by setting the horizontal distance D3 between the first edge of the first sub-film layer 101a and the first sub-division 111 to be greater than 1.5 μm, it is ensured that the distance between the first sub-film layer 101a and the first sub-division 111 is relatively far, thereby avoiding the influence of the first sub-film layer 101a.

[0058] In one embodiment, at least one sub-film layer 101 is an organic film layer. Specifically, during preparation, the thickness of the organic film layer is thicker than that of the inorganic film layer. Therefore, by setting at least one sub-film layer 101 as an organic film layer, the depth of the dredging structure 03 prepared in the organic film layer is deeper, that is, the interval between two adjacent dredging structures 03 is larger, so that more materials of the first protective layer 02 can be accommodated, further reducing the flow distance of the first protective layer 02 and improving the display effect of the display panel.

[0059] It should be noted that when the top film layer 10 includes the first sub-film layer 101a and the second sub-film layer 101b, the first sub-film layer 101a can be a protective layer, and the second sub-film layer 101b can be one of a light-shielding layer or a light extraction layer. It can be understood that since the first sub-division 111 is a non-display area of the first region AA1, when the dredging structure 03 is prepared in the light-shielding layer or the light extraction layer, it will not affect the display area.

[0060] Based on the same inventive concept, the embodiment of the present invention also provides a display device. Figure 13Schematic structural diagram of a display device provided by an embodiment of the present invention. As Figure 13 shown, the display device includes the display module 100 of any embodiment of the present invention. Therefore, the display device provided by the embodiment of the present invention has the corresponding beneficial effects of the display module 100 provided by the embodiment of the present invention, which will not be elaborated here. Exemplarily, the display device may be an electronic device such as a mobile phone, a computer, a smart wearable device (for example, a smart watch), and a vehicle-mounted display device, etc., and the embodiment of the present invention does not limit this.

[0061] Note that the above is only a preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments, combinations with each other, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments may be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display module, characterized in that: include: The display panel comprises a first region and a second region, wherein the bending curvature of the second region is greater than the bending curvature of the first region; the display panel further comprises a top film layer, wherein the plane where the top film layer is located is a light emitting surface of the display panel; the top film layer comprises a first film layer section located in the first region and a second film layer section located in the second region, wherein the first film layer section comprises a first sub-section close to a side of the second film layer section; a first protective layer, covering the second film layer section and at least a portion of the first sub-section; A dredging structure is arranged in the first sub-division, and the first protective layer is arranged in the gap between two adjacent dredging structures; the projection length of the dredging structure in the first direction is greater than or equal to the projection length in the second direction; wherein the first direction is the direction from the first area to the second area, and the second direction intersects with the first direction.

2. The display module according to claim 1, characterized in that: The dredging structure includes a section extending along the first direction.

3. The display module according to claim 2, characterized in that: The dredging structure extends along the first direction, and a plurality of the dredging structures are arranged along the second direction.

4. The display module according to claim 2, characterized in that: The dredging structure comprises a first sub-section, a second sub-section and a third sub-section arranged along the first direction, wherein the second sub-section connects the first sub-section and the third sub-section; The first section and / or the third section extends along the first direction, and the second section includes a curve.

5. The display module according to claim 1, characterized in that: The dredging structure comprises at least a fourth section, the fourth section extending along a third direction, and the third direction intersects both the first direction and the second direction; A projected length of the fourth section in the first direction is greater than a projected length in the second direction.

6. The display module according to claim 1, characterized in that: The display module further comprises a plurality of dredging structure groups, each dredging structure group comprises at least two dredging structures, and at least two dredging structures in the same dredging structure group are arranged along a fourth direction, and the fourth direction intersects both the first direction and the second direction; The projection length of at least two dredging structures in the same dredging structure group in the first direction is greater than the projection length in the second direction.

7. The display module according to claim 1, characterized in that: Along the second direction, the maximum width of the dredging structure is D1, and the minimum distance between two adjacent dredging structures is D2, wherein 2 μm≤D1≤4 μm, and 2 μm≤D2≤4 μm.

8. The display module according to claim 1, characterized in that: The top film layer includes at least one sub-film layer; Along the thickness direction of the display module, a gap between two adjacent dredging structures penetrates at least a portion of the sub-membrane layer.

9. The display module according to claim 8, characterized in that: The display panel further includes a substrate; Along the thickness direction of the display module, the dredging structure includes a first surface away from the substrate and a second surface close to the substrate; Along the thickness direction of the display module, the first surface covers the second surface.

10. The display module according to claim 9, characterized in that: The dredging structure further includes a plurality of side surfaces, wherein the side surfaces connect the first surface and the second surface; An included angle between the side surface and the second surface is α, wherein α satisfies: 120°≤α≤150°.

11. The display module according to claim 8, characterized in that: The display panel further includes a substrate; Along the thickness direction of the display module, the dredging structure includes a third surface away from the substrate and a fourth surface close to the substrate; The orthographic projection area of ​​the third surface on the plane where the substrate is located is smaller than the maximum orthographic projection area of ​​the dredging structure on the plane where the substrate is located, and the orthographic projection area of ​​the fourth surface on the plane where the substrate is located is smaller than the maximum orthographic projection area of ​​the dredging structure on the plane where the substrate is located.

12. The display module according to claim 11, characterized in that: The top film layer includes a first sub-film layer and a second sub-film layer, wherein the first sub-film layer is located on a side of the second sub-film layer away from the substrate; The dredging structure includes a first dredging sub-section located in the first sub-membrane layer and a second dredging sub-section located in the second sub-membrane layer; The first dredging sub-portion includes the third surface and the fifth surface, wherein the fifth surface is located on a side of the third surface close to the substrate; the orthographic projection area of ​​the third surface on the plane where the substrate is located is smaller than the orthographic projection area of ​​the fifth surface on the plane where the substrate is located; The second dredging section includes the fourth surface and the sixth surface, wherein the sixth surface is located on a side of the fourth surface away from the substrate; the orthographic projection area of ​​the fourth surface on the plane where the substrate is located is smaller than the orthographic projection area of ​​the sixth surface on the plane where the substrate is located.

13. The display module according to claim 8, characterized in that: The display panel further includes a substrate; The top film layer includes a first sub-film layer and a second sub-film layer, wherein the first sub-film layer is located on a side of the second sub-film layer away from the substrate; The first subdivision includes a portion of the second sub-film layer; Along the thickness direction of the display module, the dredging structure penetrates the second sub-film layer.

14. The display module according to claim 13, characterized in that: Along the first direction, the second sub-membrane layer includes a first edge close to the dredging structure, and a horizontal distance between the first edge and the first sub-division is D3, wherein D3>1.5 μm.

15. The display module according to claim 8, characterized in that: At least one of the sub-film layers is an organic film layer.

16. The display module according to claim 1, characterized in that: The top film layer includes a second sub-film layer; The second sub-film layer includes one of a light shielding layer and a light extraction layer.

17. A display device, characterized in that: A display module comprising any one of claims 1-16.

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